Brace yourselves. Wall-sits are coming. See how long you can do it for and share a photo of yourself performing the exercise! Bonus? Reblog to challenge your followers to do a wall-sit with you and see who can hold it for longer! PumpUp member bangerz10 loves to pass the time during her #wallsit by singing her favourite song. She adds weight when she can!Check out the FULL challenge here: http://blog.pumpup.co/tagged/challenge